Mixture of Cyclotetrasiloxane, octamethyl- + Heptane

Datasets

1. Excess molar enthalpy (molar enthalpy (3)
2. Excess molar volume, m3/mol

Excess molar enthalpy (molar enthalpy of mixing), kJ/mol [ref]

Fixed			Measured
Mole fraction of Heptane (2) - Liquid	Temperature, K - Liquid	Pressure, kPa - Liquid	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol - Liquid
0.5000	298.15	101.00	1.0000

Partial molar enthalpy, kJ/mol of Heptane (2) [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101 (Liquid)

Mole fraction of Heptane (2) - Liquid	Partial molar enthalpy, kJ/mol of Heptane (2) - Liquid
0.0162	1.1772
0.0318	1.1588
0.0617	1.1156
0.0760	1.0929
0.0898	1.0721
0.1032	1.0582
0.1163	1.0342
0.1289	1.0183
0.1412	1.0012
0.1532	0.9841
0.1648	0.9660
0.1871	0.9306
0.2185	0.8887
0.2284	0.8743
0.2381	0.8619
0.2475	0.8465
0.2567	0.8321
0.2657	0.8207
0.2744	0.8112
0.2830	0.7967
0.4962	0.4906
0.5025	0.4800
0.5087	0.4724
0.5148	0.4657
0.5207	0.4571
0.5264	0.4494
0.5320	0.4418
0.5375	0.4351
0.5429	0.4264
0.7440	0.1682
0.7469	0.1653
0.7497	0.1625
0.7551	0.1567
0.7577	0.1539

Partial molar enthalpy, kJ/mol of Cyclotetrasiloxane, octamethyl- (1) [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Mole fraction of Heptane (2) - Liquid	Partial molar enthalpy, kJ/mol of Cyclotetrasiloxane, octamethyl- (1) - Liquid
0.2653	0.0633
0.2674	0.0635
0.2695	0.0646
0.2717	0.0657
0.2761	0.0680
0.2784	0.0711
0.2807	0.0673
0.4830	0.2627
0.4860	0.2668
0.4890	0.2710
0.4921	0.2732
0.4952	0.2794
0.4984	0.2816
0.5016	0.2877
0.5048	0.2929
0.5081	0.3011
0.7350	0.7971
0.7391	0.8062
0.7516	0.8475
0.7559	0.8606
0.7602	0.8748
0.8927	1.4377
0.8975	1.4667
0.9024	1.4928
0.9123	1.5389
0.9173	1.568
0.9224	1.599
0.9275	1.6281
0.9380	1.6672
0.9433	1.7322
0.9487	1.7632
0.9541	1.7993
0.9708	1.9193
0.9765	1.9583
0.9823	2.0082
0.9881	2.0412

Excess molar volume, m3/mol [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101 (Liquid)

Mole fraction of Heptane (2) - Liquid	Excess molar volume, m3/mol - Liquid
0.0573	1.0100e-07
0.1122	1.7500e-07
0.2048	2.8900e-07
0.3094	3.8500e-07
0.4013	4.4200e-07
0.5287	4.9000e-07
0.6210	4.5900e-07
0.7084	4.3500e-07
0.8312	3.2800e-07
0.9054	2.1600e-07
0.9515	1.2500e-07
0.9598	1.0300e-07
0.9730	7.1000e-08
0.9860	3.9000e-08

Sources

• Thermodynamic Study of Heptane + Silicone Mixtures. Excess Volumes and Enthalpies at 298.15 K

Note: These property values are available through the Cheméo API. A free account gives you an access key.